:I dont assume these are T+/T- as no tests have been done yet. Quite by accident the lavender gene popped up in this SNOW project and I have been trying to get a handle on the genetics ever since. For first time I will be back crossing the f2s to sort it out but here is what I have observed so far....At hatching there seems to be 2 obviously differing albinos but as they age(and the yellows metamorphose)they have changed to a RAINBOW(at least 4 different albinos) of colors--from white/yellow to BRIGHT orange in the red eyes...to a nice subtle purple on lavender for the lavender eyes. Included in here are at least 1"possible double"as well as 1 "possible TRIPLE"recessive animals. Because even these can still have a hidden recessive gene it may take a few breedings to figure it all out. I think with RAT snakes being more variable than balls(my opinion due to metamorphasis)there differences should be more obvious in the adults. Not enough data to discern which are which at hatching yet....Hope this helps.Jeff

Have you read Bern Bechtel's piece about black rats in one of the 1985 issue of the Journal of Heredity? It might help you.

Bechtel crossed the T- and T+ albinos and got normals, which means they are not allelic. He also had a yellowish type that he called xanthic that was allelic with the T+ albinos. The heterozygote was intermediate between the xanthic and T+ parents.